<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width: 400px;
            height: 100px;
            border: 10px groove red;
            /*设置圆角 值越大越圆 大于宽高的一半为正圆(正方形)*/
            border-radius: 2px;
            /*内边距,元素内边距会影响元素宽高*/
            padding-top: 100px;
            padding-left: 100px;
        }
    </style>
</head>
<body>
<div>测试文本</div>
</body>
</html>